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arXiv 1802.00732math.AG
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完整与反常对数D-模

Holonomic and perverse logarithmic D-modules

Clemens Koppensteiner, Mattia Talpo

摘要:

我们介绍的概念完整的D-模光滑(理想化)的对数计划,并表明Verdier对偶可以扩展到这方面。与经典情形相反,完整模沿开浸入的推进一般不是完整的。我们在相干对数D-模范畴上引入了一个“反常”的t-结构,使得完整模上的对偶函子是t-正合的。这使我们能够转移一些形式主义从经典的设置,特别是表明,每一个完整的模块上的一个开放的子计划可以扩展到一个完整的模块在整个空间。相反,这种t-精确性刻画了所有相干对数D-模中的完整模。我们还介绍了对数版本的Gabber和Kashiwara-Malgrange过滤。

英文摘要:

We introduce the notion of a holonomic D-module on a smooth (idealized) logarithmic scheme and show that Verdier duality can be extended to this context. In contrast to the classical case, the pushforward of a holonomic module along an open immersion is in general not holonomic. We introduce a "perverse" t-structure on the category of coherent logarithmic D-modules which makes the dualizing functor t-exact on holonomic modules. This allows us to transfer some of the formalism from the classical setting and in particular show that every holonomic module on an open subscheme can be extended to a holonomic module on the whole space. Conversely this t-exactness characterizes holonomic modules among all coherent logarithmic D-modules. We also introduce logarithmic versions of the Gabber and Kashiwara-Malgrange filtrations.

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